function cardnumber_ccv_set_limit (cardtype) {
        cardnumberformfield = document.wpac_ccform.EPS_CARDNUMBER;
        ccvformfield = document.wpac_ccform.EPS_CCV;
        switch (cardtype) {
                case "visa":
                case "mastercard":
                case "bankcard":
                        cardnumberformfield.maxlength = 16;
                        ccvformfield.maxlength = 3;
                        return true;
                        break;
                case "amex":
                        cardnumberformfield.maxlength = 15;
                        ccvformfield.maxlength = 4;
                        return true;
                        break;
                default:
                        alert("Javascript Error - Invalid Card Type Specified.");
                        return false;
        }
}